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Further information may be obtained from the Gammasphere event format web page.

GammasphereTapeUball Handler

The GammasphereTapeUball handler supports the basic Ge+BGO formats plus neutron and microball extensions.

This is the standard handler for Gammasphere experiments at Berkeley.

The event header is output as a 9 word group as follows ...

header[255] (cleange,dirtyge_bgoonly,ttH,ttM,ttL,tac1,tac2,gelowsum,bgolowsum)

The GE and BGO detectors are output as N-parameter groups,
where the number of words in the following list is dependent on the value of "modeflags" ...

ge[1:110] (hit_pattern,ge_high,ge_side,ge_time,ge_trap,ge_low,bgo_time,bgo_low)

The (optional) microball detectors are output as N-parameter groups as follows ...

mball[111:210] (hit_pattern,gehigh,geside,getime)

The (optional) neutron detectors are output as N-parameter groups as follows ...

nwall[211:254] (hit_pattern,gehigh,geside,getime,getrap)

GammasphereTapeOrig Handler

An original handler handling 8 word event headers and different Ge sub-record order.

The event header is output as a 6 word group as follows ...

header[255] (usec1,usec2,usec3,ge_low,bgo_low) ge[1:110] (hpid,gehigh,getime,getrap,gelow,geside,bgo_time,bgo_low)

GammasphereTape10 Handler

An original handler handling 10 word event headers and different Ge sub-records.
Data format output is as for the GammasphereTape handler.

Tape Format

The GammasphereTapeUball handler requires tape volume name of the form TAPEnn, where nn is a number to differentiate different tapes.
Filenames are of the form runxx, where xx is the run number taken from the file header.

Raw (Skim) Tape Format

This is a compressed tape format containing only energy and time pairs.
The GE detectors are output as 2-parameter groups as follows ...

ge[1:110] (energy,time)

Prescan Tape Format

The GammasphereTapeUballPrescan handler supports a compressed tape format as follows ... 

=======================================================================
 Gammasphere + Microball + Neutron Detectors: Prescanned Tape format
=======================================================================
        FFFF event separator
=======================================================================
 
 
 1st word: NNNN NNNN ---- ---- Run number
           ---- ---- NNNN NNNN Number of words in this event
 
 2nd word: NNNN NNNN ---- ---- Clean Ge fold BEFORE tests
           ---- ---- NNNN NNNN Clean Ge fold AFTER tests
 
 3rd word: NNNN NNNN ---- ---- dirty Ge fold  
           ---- ---- NNNN NNNN clean BGO fold 

 4th word: NNNN NNNN NNNN NNNN Lowres sum energy

 5th word: NNNN NNNN NNNN NNNN BGO sum energy 
      
 6th word: NNNN ---- ---- ---- Number of protons in event (15 max)
           ---- NNNN ---- ---- Number of alphas in event (15 max)
           ---- ---- NNNN ---- Number of discriminated neutrons in event
           ---- ---- ---- NNNN Number of Raw neutrons in event,

-----------------------------------------------------------------------

 7th word: NNNN NNNN NNNN NNNN gamma detector number (Devlin convention)

 8th word: NNNN NNNN NNNN NNNN gamma energy, 1/3 keV/channel

 9th word: NNNN NNNN NNNN NNNN side channel 
      
            repeat words 6 and 7 "Clean Ge fold AFTER tests" times

	     now comes particle information...protons first

-----------------------------------------------------------------------

 nth word: NNNN NNN- ---- ---- proton detector number (note 7 bits)
           ---- ---N NNNN NNNN proton energy, centre of mass, 
                                at 0.25 MeV/channel (note 9 bits)

 (n+1)th:  NNNN NNNN ---- ---- centre of mass theta for proton
           ---- ---- NNNN NNNN jacobian for proton

                repeat the above two words for each proton in event

 mth word: NNNN NNN- ---- ---- alpha detector number (note 7 bits)
           ---- ---N NNNN NNNN alpha energy, centre of mass, 
                                at 0.25 MeV/channel (note 9 bits)

 (m+1)th:  NNNN NNNN ---- ---- centre of mass theta for alpha
           ---- ---- NNNN NNNN jacobian for alpha

                repeat the above two words for each alpha in event

-----------------------------------------------------------------------

		 now comes neutron information...
		 discriminated neutrons first

  pth:     ---- ---- ---- NNNN ID number of 1st discriminated neutron
           ---- ---- NNNN ---- ID number of 2nd discriminated neutron
           ---- NNNN ---- ---- ID number of 3rd discriminated neutron
           NNNN ---- ---- ---- ID number of 4th discriminated neutron 

		 raw neutrons next

 (p+1)th:  NNNN NNNN NNNN NNNN ID Number for raw neutron
 (p+2)th:  NNNN NNNN NNNN NNNN E1 Number for raw neutron
 (p+3)th:  NNNN NNNN NNNN NNNN E2 Number for raw neutron
 (p+4)th:  NNNN NNNN NNNN NNNN T1 Number for raw neutron
 (p+5)th:  NNNN NNNN NNNN NNNN T2 Number for raw neutron

=======================================================================
        FFFF event separator
=======================================================================

This is mapped onto the following format statements ... 

=======================================================================
 Trigger words:
-----------------------------------------------------------------------
    gebefore   = clean Ge fold before tests (TAC pu etc)
    cleange    = clean Ge fold after tests
    dirtyge    = dirty Ge fold
    cleanbgo   = BGO fold (=k)
    gsum       = sum of ge low resolution energies (H sum energy +)
    bgosum     = sum of bgo low resolution energies (+ H sum energy)        protons    = number of protons
    alphas     = nuimber of alphas
    discs      = number of discriminated neutrons
    neuts      = number of raw neutrons 
    discids    = contains ID's of discriminated neutrons
=======================================================================
trigger[255] (gebefore,cleange,dirtyge,cleanbgo,gesum,bgosum,protons,alphas,discs,neuts,discids) 
=======================================================================
 Germanium words:
-----------------------------------------------------------------------
    segcode   = Ge ID code (see Devlin convention below)
    gehigh    = high resolution gamma energy
    geside    = side channel energy
-----------------------------------------------------------------------
     DETECTOR NUMBERS (Devlin convention)
-----------------------------------------------------------------------

 Side channel determinations have been placed on the output tapes.
 Detector numbers have been written to reflect the side channel as
 follows (where nnn = Ge ID):

 -1nnn: unsegmented detector (no correction: adjust angle by 0)
 -2nnn: center (no correction: adjust angle by 0)
 -3nnn: high ratio of detector divided into thirds 
         (adjust angle by +2.9)
 -4nnn: low ratio of detector divided into thirds
	  (adjust angle by -2.9)
 -5nnn:  high ratio of detector divided into halves
	  (adjust angle by +2.4)
 -6nnn:  low ratio of detector divided into halves
	  (adjust angle by -2.4)

  In general -Xnnn ....  X is the segcode
=======================================================================
ge[1:110] (segcode,gehigh,geside) 
=======================================================================
 Microball format:
-----------------------------------------------------------------------
     pora    = Proton/Alpha flag (0/1)
     energy  = Particle Energy (bits 1-9)
     jack    = Particle jacobian (bits 1-8)
               Centre of mass theta (bits 9-16)
=======================================================================
uball[111:206] (pora,energy,jack) 
=======================================================================
 Neutron detector format: 
-----------------------------------------------------------------------
     promptE = neutron prompt energy   
     delayE  = neutron delayed energy     
     rawT    = raw time of flight     
     cleanT  = clean time of flight
=======================================================================
neutron[211:225] (promptE,delayE,rawT,cleanT)

Maintained by Janet Sampson and John Cresswell (University of Liverpool)
Email to support@ns.ph.liv.ac.uk